期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 11, 期 12, 页码 4859-4865出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c01274
关键词
-
类别
资金
- Russian Science Foundation [17-19-01787]
- Russian Science Foundation [20-19-18057] Funding Source: Russian Science Foundation
Supercapacitors based on carbon nanomaterials are attracting much attention because of their high capacitance enabled by large specific surface area. The introduction of heteroatoms such as N or O enhances the specific capacitance of these materials. However, the mechanisms that lead to the increase in the specific capacitance are not yet well-studied. In this Letter, we demonstrate an effective method for modification of the surface of carbon nanowalls (CNWs) using DC plasma in atmospheres of O-2, N-2, and their mixture. Processing in the plasma leads to the incorporation of similar to 4 atom % nitrogen and similar to 10 atom % oxygen atoms. Electrochemical measurements reveal that CNWs functionalized with oxygen groups are characterized by higher capacitance. The specific capacitance for samples with oxygen reaches 8.9 F cm(-3) at a scan rate of 20 mV In contrast, the nitrogen-doped samples demonstrate a specific capacitance of 4.4 F cm(-3) at the same scan rate. The mechanism of heteroatom incorporation into the carbon lattice is explained using density functional theory calculations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据